body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background-color: #fff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    width: 100%;
    max-width: 600px;
    box-sizing: border-box;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.purchase-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.purchase-table th, .purchase-table td {
    padding: 10px;
    border-bottom: 1px solid #ddd;
    text-align: left;
}

.purchase-table th {
    background-color: #f2f2f2;
    font-weight: bold;
}

.purchase-table input, .purchase-table select, .purchase-table button {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.submit-row {
    text-align: center;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}